Tubular burner



sept. 1o, l1929.` R. THURM 1,727,527

TUBULAR. BURNER Original Filed Oct. 15, 1925 INVE TOR l Patented Sept'.10, 1929.

UNITED STATES RICHARD THUBM, F 'SAGINAW, MICHIGANQ PANY, INCORPORATED,OF SAGINAW, MICHIGAN,

renom Bunyan ASSIGNOR T0 BAKER PERKINS COI- A CORPORATION OF NEWVYOBX.-

Original application illed October 15, 1925, Serial No. 62,511. Dividedand this application med January 31, 1928. Serial No.' 250,849.

This invention relates to burners for illuminating gas, producer gas,water gas, vaporized oils and similar fuels, and partie'- ularly to thelong tubular burners which are used for burning mixtures of gaseousfuels and air in substantially yoxygen-free atmospheres as, for example,in baking ovens. When the ordinary long tubular burner supplied with acombustible mixture of air an gaseous fuel is located so" that thecombus' tion at its outlets takes place in a lmore or less confinedspace in an atmosphere that is substantially free from or at leastdeficient in yoxygen and raised to a comparatively high temperature,there is liability to objectionable and somewhat dangerous backiiringand explosions.

The principal object of the present invention is to provide an improvedburner so constructed as to prevent such back-firing and explosions andto insure a continuous and substantially uniform combustion throughoutthe length of'the burner.

Vith these and other objects in view, the invention comprises the noveland improved features, constructions andr` combination of partshereinafter described and particularly pointed out in the claims, theadvantages of which will be clearly understood and appreciated by thoseskilled in the art.

This application is a divisional application based upon certain subjectmatter contained in a prior application, Serial No. 62,511, filedOctober 15, 1925, by Richard Thurm and Eugene Oscar Engels.

The invention will be clearly understood from the accompanying drawingsillustrating the invention in its preferred form, and the followingdetailed description of the constructions therein shown.

In the drawingsn i Figure 1 is a View in side elevation ofra' oven andits connection to thei'n'eit'ns for sup'- plying fuel thereto; p k1 yFigure `2 is a vertical sectionalv view through heburner taken on the'line 2-2 of Figure 1;

Figure 3 is a top plan View on an enlarged scale of a portion of theburner; and

Figure 4 is a detail vertical sectional view illustrating certain partsof the burner removed therefrom.

Inthe illustrated embodiment of the invention, the burner includes asuitable fuel chamber to which combustible fuel is supd rplied from asuitable conduit which preferbly extends substantially throughout thelength of the' fuel chamber. This conduit is supplied with combustiblefuel from a fuel main to which the fuel is supplied from a mixing devicewhich in turn has connection with suitable means for supplying thedifferent elements of which the fuel is composed. From the fuelchamberlthe fuel is discharged and burned at the point of discharge.

One type of chamber which has proven quite successful in actualoperation consists of a tubular member 14 substantially circular incross sectional form. This tubular member 14 is provided with anelongated opening preferably in the form of a the length of which isdetermined by the length of flame desired. In this type of burner aconduit l is employed and this conduit extends preferably throughout theentire length of the chamber formed by the 'tubular member 14, asindicated by dotted lines in Figure l. This conduit 15 is of tubularform, semi-circular in cross section and, as shown in Figure 2 is(located in the lower portion of the tubular member 14 with its planewall positioned upwardly, thus providing a fuel chamber 2G.v SuitabledischargeJ openings, staggered perforations 2l, are provided in theplane wall of the conduit 15 and these discharge openings serve topermit the fuel j to pass from the conduit 15 into the chamber 120,.formed by the tubular member 14 in a burner embodying the inventionshowings' its arrangement in the chamber of '1a' vbaking manner whichmaintains a uniform pressure of fuel in the chamber/20. ,Fuel issupplied' yto the conduit 15 by means of a suitable pipe w t controlledbyva` valve 8 and connected to a combustible fuel supply in the form ofa fuel main 7. Combustible fuel is supplied slot 16,-

such for example, as the,

to the 'fuel main 7 from a suitable mixing y.

v device 9-to which the elements of the fuel be provided with suitablemeans, which forms a pluralit of relatively long through w ich the fuelpasses in lts discharge from the tubular member 14.

To obtain the aforementioned results a suitable structure is positionedwithin the elongated opening or slot 16V and this structure preferablycom rises two parallel bars 0r plates 24 which orm side walls for theelongated opening and slot 16 as more clearly shown in Figure 2. Theseside walls are retained in spaced relation b means of 'a suit'- vabledistributing element w ich in the present instance is shown as a lengthor-strip of wire mesh Aof substantially the same width as the plates 24interposed between said plates. This structure, including the plates 24and the wire mesh spacing and distributing member 25 may be securedtogether to form a unitary .structure by a suitable fastening meanssuch,

for example, as rivets 26 arranged in suitably spaced openings 29provided, in the plates which form'the side walls, and said plates 24are maintained in predetermined spaced relation b ysuitable spacingmembers 30, which prefera ly surround the Yrivets 26.

As shownA in Figure 2 this structure is positioned in the opening orslot 16 and is prefer- I ably adapted to rest upon bolts 22 which extendtransversely of the tubular member 14 and are positioned in suitablyoppositel disposed openings therein. It will be note that the barsforming the side walls 24 are of such .outer edges of t .resting -uponthe bolts 22. After the bars or a width that the project slightly beyondthe lie openin 16 when they are side walls 24 have been positioned inthe opening or elongated slot 16 nuts 23 carried vby the transverselyextending bolts 22 are tightened and theY tubular member 14 iscontracted until the sides of the slot 16 engage their respective sidewalls 24, and u n further tightening of the nuts 23, the si e walls 24and the wire mesh s acing member 25 will be firmly clampe in position inthe elongated opening 16 and the edgesp of the elongated opening 16 byreason of their contact with their respective side walls 24, will form agas-tight joint therewith to preclude the ssibility of fuel escapingaround the outsi e of the side walls 24.

The unitary structure which comprises the i side walls 24 and the wiremesh spacing member 25 may also be retained in the elongated opening 16by means of end plates 27 which` assageways opening. If desired, one ormore clips such as 40 may be employed between the ends of the elongatedopening 16, said clips being so formed as to overlie the plates 24 toserve to retain them in position. Each of these clips is secured to thetubular member 14 in any desired manner, a screw 41- being herein shownfor this purpose.

By this construction, it willbe apparent that the space between the sidewalls 24 will be e divided by the wire mesh member 25 into a pluralityof sinuous passages through which the fuel is caused to pass in itsdicharge from` the'tubular member 14. It has been found that such astructure, that is, one which discharges the fuel through relativelylong passages, gives highly satisfactory results and materially aids intl1e`proper combustion of the fuel at the combustion points.

By varying the mesh ofthe spacing mem-r ber 25, the burner is readilyadapted to use with fuels of different character, and in this manneralso the volume of heat produced by the burner may be controlled.

A burner construction in accordance with the present invention has manywide and varied vuses. It is herein shown as a burner for baking ovensand it is'to be understood that several. of these burners are employedfor heating the oven. The burners may be supported from the oppositewalls 10 and l 11 of the oven, as shown in Figure 1, and between thesewalls 10 and 11 suitable supports 12 extend transversely of the burnersto prevent sagging thereof between their,I ends.V

While I have described a referred embodiment of my invention, I rea ethat it may be embodied in widely dilerent forms other than that shownand I, therefore, do not limit myself to the particular constructionillustrated and described herein.

` What. is claimed as new is:

1. A gaseous fuelburner comprising a coniis duit for gas jand the likehaving an elongated discharge opening therein, and means for controllingthe flow of gas through said opening, said controlling mea-ns'comprisinga plu-A rality of check bars extending longitudinallyof said opening,and wire mesh inte used therebetween to maintain them in space rel.-tion, said check bars and Wire'mesh project ing into the conduit toprovide relatively longA -passa es for the fuel.

2. gaseous fuel burner comprising a conduit for gas and the like havingan elongated discharge opening therein, and means for vcontrollingthe-flow of gas through said openi in said controlling means comprisinga plura ity of check bars extending longitudinally of said opening, andWire mesh inter osed therebetween to maintain them in sV ace rela--tion, said check bars and Wire mes being of substantially the samelength and width ,and projecting into the conduit to provide relativelylong passages for the fuel.

3. A gaseous fuel burner comprising a cnduit i for gas having anelongated opening therein provided with Walls extending longitudinallythereof, said walls being spaced apart, and a single layer of wire meshinterposed between and engaged by both said walls to provide passagesfor the fuel..

4. A gaseous fuel burner comprising a conduit for gas and the likehaving an elongated opening therein provided ,with Walls runninglongitudinally thereof, 'said walls being spaced a art, and a singlelayer of Wire mesh of a wi th substantially equal to the width of thesaid walls, said Walls and Wire mesh ex tending into said gas conduit.

5. A gaseousfuel burner comprising a conduit for gas and the like havingan elongated burner opening therein7 a pair of check bars mounted insaid opening, and a single layer oiwire mesh interposed between saidcheck bars and engaged by the inner surfaces of the bars to space thebars and formpassages for the fuel. y

6. A gaseousy fuel burner comprising a conduit for gas and the likehaving an elongated opening therein, and means for controlling the iiowof gas through said opening, said means including check bars mounted insaid opening, and a single layer of wire mesh interposed between saidcheck bars, said check bars and wire mesh extending into said con-v duitto form elongated passages'for the fuel.. Signed at Saginaw, Michigan,this 27th day of Jany, ll92v8a RICHARD THURM.

